ABSTRACT

Phosphorus deficiency is one of the main factors for limiting agricultural production. The use of Phosphate Soluble Bacteria (PSB) is an environmentally friendly solution to eliminate phosphorus deficiency. Isolation of PSB and determination of plant growth effects of maize were aimed at this study. For this purpose, 62 phosphate solubilizing rhizobacterial strains isolated from soil and the phosphate solubilization abilities of isolates were determined by laboratory, pot, and field trials. After laboratory trials with 62 strains, pot tests were established with 10 isolates. Inoculation of phosphorus PSB was increased plant height 19.38–54.25% and plant dry weight 12.32–67.63% under pot experiments. Field trials were conducted between 2014 and 2016 with two PSB (S. marcensens and P. brenneri) according to pot experiments. S. marcensens and P. brenneri increased yield of maize 32–33% in 2014 and 28–25% in 2015, respectively. Application of P. brenneri increased leaf P, K, and Mg content by 13%, 5%, 9%, and S. marcensens increased the same by 10%, 6%, 17%, respectively. P. brenneri and S. marcensens can be used as biological fertilizers as a promising and sustainable approach to maize productivity in P deficient soils.

摘要

磷缺乏是限制农业生产的主要因素之一。使用磷酸盐可溶性细菌 (PSB) 是一种消除磷缺乏症的环保解决方案。本研究旨在分离PSB并测定玉米的植物生长效应。为此，通过实验室、盆栽和田间试验确定了从土壤中分离出的 62 株解磷根际菌株和分离株的解磷能力。在对 62 个菌株进行实验室试验后，对 10 个菌株进行了盆栽试验。在盆栽试验中，接种磷 PSB 可提高株高 19.38-54.25% 和植物干重 12.32-67.63%。2014 年至 2016 年间，使用两个 PSB（ S. marcensens和P. brenneri）进行了现场试验) 根据盆栽实验。S. marcensens和P. brenneri在 2014 年和 2015 年分别增加了 32-33% 和 28-25% 的玉米产量。施用P. brenneri使叶片 P、K 和 Mg 含量增加了 13%、5%、9%，S. marcensens 分别增加了 10%、6%、17%。P. brenneri和S. marcensens可用作生物肥料，作为在 P 缺乏土壤中提高玉米生产力的有前途且可持续的方法。